Cisco PIX 500 Series Configuration Manual page 504

H.323 Inspection
To specify traffic that should not match the class map, use the match not command. For example, if the
match not command specifies the string "example.com," then any traffic that includes "example.com"
does not match the class map.
For the traffic that you identify in this class map, you can specify actions such as drop-connection, reset,
and/or log the connection in the inspection policy map.
If you want to perform different actions for each match command, you should identify the traffic directly
in the policy map.
Create the class map by entering the following command:
a.
hostname(config)# class-map type inspect h323 [match-all | match-any] class_map_name
hostname(config-cmap)#
Where the class_map_name is the name of the class map. The match-all keyword is the default, and
specifies that traffic must match all criteria to match the class map. The match-any keyword
specifies that the traffic matches the class map if it matches at least one of the criteria. The CLI
enters class-map configuration mode, where you can enter one or more match commands.
(Optional) To add a description to the class map, enter the following command:
b.
hostname(config-cmap)# description string
Where string is the description of the class map (up to 200 characters).
(Optional) To match a called party, enter the following command:
c.
hostname(config-cmap)# match [not] called-party regex {class class_name | regex_name }
Where the regex regex_name argument is the regular expression you created in
regex_class_name is the regular expression class map you created in
d. (Optional) To match a media type, enter the following command:
hostname(config-cmap)# match [not] media-type {audio | data | video}
Create an H.323 inspection policy map, enter the following command:
Step 4
hostname(config)# policy-map type inspect h323 policy_map_name
hostname(config-pmap)#
Where the policy_map_name is the name of the policy map. The CLI enters policy-map configuration
mode.
Step 5 (Optional) To add a description to the policy map, enter the following command:
hostname(config-pmap)# description string
To apply actions to matching traffic, perform the following steps.
Step 6
Specify the traffic on which you want to perform actions using one of the following methods:
a.
b. Specify the action you want to perform on the matching traffic by entering the following command:
hostname(config-pmap-c)# {[drop [send-protocol-error] |
drop-connection [send-protocol-error]| mask | reset] [log] | rate-limit message_rate }
Cisco Security Appliance Command Line Configuration Guide
25-40
Specify the H.323 class map that you created in
•
hostname(config-pmap)# class class_map_name
hostname(config-pmap-c)#
Specify traffic directly in the policy map using one of the match commands described in
•
If you use a match not command, then any traffic that does not match the criterion in the match
not command has the action applied.
Chapter 25 Configuring Application Layer Protocol Inspection
Step
Step 3 by entering the following command:
Step 1. The class
2.
Step 3.
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